Nonreversible pump



Dec. 10, 1929. H. T. WHEELER NONREVERSIBLE PUMP Filed Sept. 14, 1926 2 Sheets-Sheet INVENTOR.

IIHEIIIII ATTORNEY.

Patented Dec. 10, 1929 UNITED STATES PATENT OFFICE HARLEY T. WHEELER, 01 DALLAS, TEXAS, ASSIGNOR T BETH H. WHEELER, 0F

DALLAS, TEXAS nonnnvnnsrnnn ruivrr Application filed September 14, 1926. Serial No. 135,384.

This invention relates to vacuum pumps and it has particular reference to certain new and useful improvements in liquid beverage pumps adapted especially for use in soda dispensing fountains, and its principal object resides in its capability of predetermining the quantity of liquid dispensed at each operation, thus eflecting a considerable saving in the commodity by the apparent uniformity of discharge.

Another object of the invention resides in the novelty of structure, particularly the pressure equalizing means controlling the piston, and further, the means for restraining the piston against reversional movement in incomplet-e stages of operation or premature suspension of liquid flow.

Still another and important object of the invention resides in the peculiar form of the discharge orifice of the spout, so constructed as to obviate leakage while not in use, and as a measure against waste.

With these objects and advantages in view, other objects as well as certain features of a construction and arran ement of Jarts will become apparent as the description proceeds taken in connection with the accompanying drawings, wherein:

Flgure 1 represents a rear elevatlonal view .1 of a pump constructed according to the present invention.

Figure 2 is a side view thereof, and

Figure 3 is an elevational view in vertical cross-section illustrating the fluid passages and control valves.

Continuing more in detail with the draw-,

ings, it will be observed in F igures 1 and 2 that a frame 1 is provided of such form as to rigidly support the parts, consisting principally of the cylinder 2, piston 3 and ratch bar 1. As apparent, the frame is readily removable for adjusting, repairing or cleaning the parts. 7

The pump is so constructed as to be operative in the conventional syrup receptacle forming part of the equipment of standard soda fountains without alteration in any respect, and may be adjusted, as will presently become apparent, to dispense any quantity of J liquid desired in uniform measures. The top 5 is arranged to conformably fit into the rethe fountain, and in this case, the fluid pipe 6,

in which is contained a check valve 7 is directed into the container which serves equally as well as in the former case.

The cylinder 2, while it may be of any capacity, is ordinarily constructed to contain an ounce of syrup as a beverage ingredient, and has operating therein the piston head 8, as in Figure 3, situated upon the piston 3, 5 which latter extends upwardly, through a sleeve 9, passing through the top 5 and both are connected to a hand lever 10, pivoted at a at a spaced distance from the piston. The sleeve 9 is surrounded by a bushing 11 mounted in the top 5. A cross head 12 is carried by the lower end of the sleeve 9 and is held thereon by a set screw 13, as apparent in Figure 1, and interposed between this cross head and the cylinder 2 is a resistance element composed of reversely wound expansion springs 14. This particular feature is materially intrumental in bringing about equalization of pressure imparted to the piston in its travel both downward and upward.

A vertical fluid passage 15 is situated in 7 vertical parallel relationship with the piston 3, and has screwed thereon a dispensing spout 16, to which reference will be later and more tention is directed particularly to- Figures 1 and 2, showing the vertical ratch bar 4:,

previously referred to, situated in the. frame in parallel relationship also with the piston 3, and rigidly mounted upon the cross-head 12 is a member 20, to which is'pivotally connected a double acting detent 21, operatively engaging the notches in the bar 4 at its either end, depending upon the direction of travel of the piston 3. In order to urge the opposite ends of the detent into engagement with the notches of the bar 4:, a tension spring 22 is supplied, which has one end connected to a rearwardly extending arm 23 integral with the detent 21, while its opposite end is connected to the member 20. The action of the p ing obviously olds the ofi" c n er, hence holding one or the other of the operative points of the detent in engagement. Reversibility of the detent is accomplished by spaced stops 24, adjustable upon the bar 4 by set screws 25, provided with opposed ins-26 which latter are engaged by the ,de-

tent, thus throwing the arm'23 under tension of spring to a reverse position, the detent resisting the action of the springs 1 L upon dowmrard m vem n of h p :operation, a slight adjustment may be made t Vary the discharge quantity to any amount less than the capacityof the cylinder 3 2 by relative movement of the stops 24 upon the ratc'h bar 4. Should it be desired to increase the quantity of discharge, it is then :heeeee ry to substi e a a g y Assuming that the predetermined capacity of the cylinder is one ounce; a like quantity may be contained within the passages 18 and 15," l ressure npon the operating handle 10 depress the piston 3 hence the piston head 8 such action forcing that liquid conmi d With n the y nd r 2, through t hy-piL S 18, thus raising the column of liquid contained Within the passage 15 through the check valve 17' and discharging the same. It

sleeve on the upper end of the piston rod, a cross head carried by the lower end of the sleeve, a member rigidly carried by the cross head, a double acting detent pivoted to said member, a stationary rack bar, engageable with said detent, a rearwardly extending arm on the detent, a" coil spring connected at one .end to said arm and at its opposite end to a m mber, stops on the r ck bar engag able-with the respective opposite ends or the detent thereby to reverse the latter, the end t spring which is connected to said arm of the detent and said arm being movable on opposite sides of the detent pivot thereby to hold the detent in either of its two positions, and means to actuate the sleeve.

2. In a pump, a cylinder having a piston and piston rod'therein, a double acting detent,means to pivotally connect said detent the respective opposite ends of the detent thereby :to reverse the latter, means to actuate the rod, an arm carried by the detent, a member having connection with the piston rod,.

detent thereby to hold the detent in either,

of its two positions.

In testimony whereof I afiix my signature. 1

HARLEY T.

will he unders ood f m the foregoing scr .tion that dur ng do movement 5 1. Pi ton 3, it is not possible to raise the same until the cylinder 2 is exhausted of its contents, hu maintai g at a times a p determined quantity of liquid within the passage 15, This aetion applies likewise upon upward movement of the piston rod 3.

When the piston 3 reaches the extreme ejecting poeitioh1 the l wer stop pi11'2 0011- test with the arm 23 of the detent eversi g he lette an p mi g t pi n then to rise by the action of the springs 14:.

Partial vacuum created by the upward movement of th Pieton hea 8 e a g e y inder 2 preparatory to further operation.

The parts subject to frictional wear, such a the p s on r d 3, and detent 21 y he to the rod for movement there-with, a rack bar, stops on the rack bar engageable with readily lubricated through tubes 27 commu- Manifestl-y, the construction illustrated described i s capable of considerable vaand piston rod therein, a spring tensioned mating ith il hole accessible at the top 7 of the pump. 

